What Really Happened In 2004 tsunami?

Tuesday, April 11th 2017. | Geografi

Geologists refer to 2004 as “a monster earthquake”. The quake lasted longer than usual. Followed by mountains waves that hit the coast with a very high speed.

Gallery 10 years Tsunami Indonesia
The tsunami waves in December 2004 was recorded as the worst natural disaster in the history of modern. “An event with unimaginable dimensions, in terms of the aspect of the number of victims, as well as on the geological aspects”, writes the National Science Foundation (NSF), one of the most prestigious scientific institutions in the United States.

What happened?
Giant waves after the earthquake happened under the sea, about 100 kilometers north-west coast of Sumatra, at 7:59 local time. The epicenter is in a depth of about 30 kilometers below the seabed. There are two continental plates that collide. Great pressures then lead to one of the plates shifted down another plate. It happened on December 26, 2004, on the line of 1000 kilometers. This is a very rare event.

The earthquake caused lasting up to 10 minutes. Usually, this kind of earthquake lasted only a few seconds. According to various calculations, the strength of the earthquake when it reached 9.1 to 9.3 on the Richter scale, and was the second largest earthquake in the last 100 years. In 1960, an earthquake in Chile registered a magnitude of 9.5 on the Richter scale, what causes earthquakes facts

Gallery 10 years Tsunami Indonesia

Why does the giant tsunami waves?

One of the continental plates shifted rise to 15 meters, so it moves vertically. It merngakibatkan seafloor at several places to move up to 10 meters. That’s what makes the sea surface at the location rises suddenly. Water is pushed subsequently forming large waves, which move at very high speed, as fast as a jet plane, and move toward the coast. In the area of ​​the deep, fast-moving water is not felt on the surface. But towards the increasingly sloping beach area, the higher the waves will roll. In coastal areas of Sumatra, the waves had reached about 30 meters.

How casualties and damage caused by the tsunami?

In the Indian Ocean, from Sumatra to the Andaman Islands, Thailand, South India, Sri Lanka and parts of Africa, there are about 230,000 people were killed in 14 countries. The worst damage occurred in Sumatra, with about 170,000 deaths. All buildings in the devastated coastal areas, in some places up to a distance of five kilometers on land. Millions of people were left homeless.

Anyone who has a chance of surviving?

Tourists who were diving in the sea, feeling the water flow faster, but they do not run into anything. Also the fishermen who were fishing, do not feel there will be a giant wave. Residents react quickly and be able to escape to high ground also survived. The people who lived at the home level, high enough and strong enough to withstand the brunt of the water as well as items which were dragged along the water, survived.

Is there a warning to the population?

No party in the disaster area at the time had a tsunami emergency plan. US tsunami warning center in Hawaii when it was realized that there was a great earthquake and the threat of the emergence of a powerful giant wave. But they do not know where the parties who should be contacted in the affected areas. So they issued a general warning.

What has been done since this catastrophe?

It was now a tsunami early warning system built along the waters between Indonesia and Thailand. Any change in water level observed for 24 hours, and there is an automatic alert in the event of a sudden change. Early warning center in Jakarta is ready to send out warnings to areas throughout Indonesia.

With the help of German experts from the Geological Research Center in Potsdam, tsunami early warning system successfully enabled. Alerts are sent also via SMS to those parts. Many hotels in the coastal areas now have board warning and evacuation plans if there is a tsunami threat.

How big is the risk of a tsunami in the future?

Tsunamis can not be predicted. Tensions between the plates are colliding always the case. Continental plates in west Sumatra until now under pressure. In April 2012, an earthquake under the sea again in the region with a magnitude of 8.6 on the Richter scale. But it did not happen tsunami waves were big and spacious. Why? Because time it moves horizontally.

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